Structural and magnetic properties of the coordination polymer Mn(dca)(2)(H2O)(2)center dot 2Me(4)pyz, dca = dicyanamide (N(CN)(2)(-)), Me(4)pyz = tetramethylpyrazine

The structure of Mn(dca)(2)(H2O)(2).2Me(4)pyz (dca = dicyanamide, N(CN)(2)(-); Me(4)pyz = tetramethylpyrazine) contains one-dimensional polymeric chains of Mn(dca)(2)(H2O)(2). The Me(4)pyz molecules hydrogen-bond to the water ligands, and form ... Me(4)pyz...H2O...Me(4)pyz...H2O... chains which flank either side of the coordination polymer chains. Magnetic susceptibility studies show that very weak intra-chain antiferromagnetic-coupling occurs.